The Air Fuel Ratio (AFR) is controlled by how much fuel is delivered to the cylinder for combustion. There are many factors and many sensors that come into play when trying to determine how much ...

One of the most important measurements we make while tuning an engine is finding out what the actual balance of air and fuel was inside the engine. It doesn’t matter if we have a carburetor, port ...

If you build engines, tune cars, or even just like mashing your foot on the throttle with conviction, you’ve probably heard the term “wideband O2 sensor” being thrown around at the track, dyno ...

So you either have hardware underway, or are considering getting rusEFI hardware. This manual is intended for those that are using purchased hardware. If you are not, don't worry, we also encourage ...

Lindsey Ellefson is Lifehacker’s Features Editor. She currently covers study and productivity hacks, as well as household and digital decluttering, and oversees the freelancers on the sex and ...

Tuning a stock, EEC-IV engine control module on a Fox Mustang is like trying to stream Netflix on a dial-up connection — outdated, inflexible, and likely to leave you screaming into the void. For me, ...

Mahindra & Mahindra is intensifying development of flex-fuel engines capable of operating on E30 ethanol blends and beyond, anticipating forthcoming regulatory mandates that raise ethanol content in ...

Though the Apple Watch Series 10 is also vying for shoppers’ attention, older Apple smartwatches are still attractive buys at reduced prices. The Apple Watch Series 9 in particular packs a few key ...

Apple Watch Series 10 comes with the largest screen ever paired with the thinnest design, a new chip, faster charging, and new health/fitness features. Read along for an in-depth look at what’s new ...